Valve bag and method of closing the same



@QiL E, 1931. J. c. REDINGTUN m fi VALVE BAG AND METHOD OF CLOSING THESAME Filed March 9, 1928 2 Sheets-Sheet l Zlwuenfoz John Red/nytonOch/13, 1931 J. c. REDINGTON VALVE BAG AND METHOD OF CLOSING THE SAME 2Sheets-Sheet 2 Filed March 9, 1928 g'wuanto John C. Redinyton 6M0: "up

Patented Oct. 13, 1931 UNITED STATES PATENT OFFICE JOHN (J. REDING'ION,OF GENEVA, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TO ST. REGIB PAPERCOMPANY, 01' NEW YORK, N. Y., A CORPORATION OF NEW YORK VALVE BAG ANDMETHOD OF CLOSING THE SAME Application med March 9, 1928. Serial No.280,436.

This invention relates to valve bags and a method of closing the same.More particularly, it relates to bags having valves therein adapted toreceive a large filling tube through which a charge may be filled intothe bag rapidly, there'being a sleeve within the valve which is utilizedto additionally strengthen the valved corner of the bag and the outerend of which is closed for more securely sealing the bag after filling.

Valve bags and the filling of bags through a valve opening is wellknown, but as ordinarily practiced is limited to a comparatively narrowrange of materials because of the necessity of filling the materialthrough a comparatively small opening. For commercial success it isnecessary that the filling shall be performed rapidly, and the speed ofmovement required through the small openlng in order to fill the bagsrapidly cannot be acquired with many materials without inJurmg thematerial.

Valve bags possess the great advantage of being completely manufacturedbefore they are filled, so that no closing operation is necessary afterthe filling is completed. This invention has as its main object theprovislon of a bag and a method of closing the same which will enablethe use of a large filling tube, and thereby permit the rapid filling ofbags without'subjecting the material to damage, and which can becompletely closed after filling with only a minor closing operation,thereby extending the major portion of the advantages of valve bags to amuch wlder range of materials.

In filling valve bags it is customary to sustain the valved corner ofthe bag upon a filling tube during the fillingoperation, and this cornerof the bag is thereby subjected to a considerable strain. One advantageof the present invention is that it enables the reinforcement of thevalved corner of the bag.

Other objects and further details of the invention will appear as thedescription proceeds.

In the accompanying drawings forming a part of this specification,Figure 1 is a view of the collapsed end of a tube from which a bag isformed; Fig. 2 is a view of the tube shown in Fig. 1, viewed from theright side of Fig. 1; Fig. 3 is a view similar to Fig. 1, but showingthe valve flap tucked into position and a sheet inserted in the cornerof the matic view showing the operation of filling and closing a baghaving a valve such as shown in Figs. 5 and 6;- Fig. 8 is a plan view ofthe valved corner of a bag after filling and before being closed bystapling; Figs. 9 and 10 are a side view and plan view, respectively, ofthe valve sleeve closed by stapling; Fig. 11 is a section on the line1111 of Fig. 10; Fig. 12 is a view similar to Fig. 9, but showing theend of the valve sleeve closed by sewing; Fig. 13 is a view of the partsshown in Fig. 12 viewed from the right of Fig. 12: Fig. 14 is a view ofa corner of a bag, with parts broken away, showing a modified form ofsleeve in position within the valve; Fig. 15 is a view of the valvedcorner of a filled bag with the valve sleeve closed by a wire tie.

The invention will be described as applied to a bag made from a papertube. It will be readily understood that in practice the tubes will beformed of a plurality of plies of paper, as a usual thing, but forpurposes of illustration only one thickness of bag wall is shown. I

In making valve bags from paper tubes, it is customary to fold a bagtube 20 with gussets 21 in its sides. and with one corner extendedasshown at 22, in order to form a longer valve when the corner is tuckedinto the position in which it is shown in Fig. 3.

After the valve has been tucked into the position in which it is shownin Fig. 3, a sheet of material 23 may be folded and-placed within thetucked-in valve flap. Preferably, the end of this sheet extends beyondthe side of the bag; as shown at 24.

After this sheet has been placed in position, a reinforcing tape 25 isplaced in position over the end of the bag and is sewed to the bag bymeans of a seam 26. It will be noted that seam 26 isstrengthened in thevalved corner of the bag at 27 not only by the tucked-in valve flap 22,but also by the sleeve-sheet 23. It is preferable to unite the sides ofsheet 23 so as to form a complete sleeve by means of the seam 26. Thisseam is extended to the end 24 of the sleeve.

It will be readily understood that a bag with a valve such as describedmay be placed in filling position upon a filling tube 28 of a fillingmachine of well-known type, such as shown somewhat diagrammatically inFig. 7. the filling tube being of a large size allowed by thecomparatively large valve. After the bag is filled by dischargingmaterial through filling tube 28 into the interior of the bag, thebag-carrying cradle may be rocked by means of handle 29, which turns thebag about a pivot 30 and discharges the bag onto a support 31, which isshown in Fig. 7 as being a conveyor suitable for conveying the closedbag with its valved corner beneath a closing apparatus 32.

It is preferable to fold the corners 33 of end 24: of the valve sleeveinto the position shown in Fig. 8, and then turn the remaining portion34 of end 24: to the position in which it is shown in Figs. 9 and 10.Thereafter the end of the sleeve is fastened in folded position by meansof staples 35. This securely closes the end of the valve so that anymaterial which sifts into the valve sleeve cannot escape from the bag.

While it is preferable to fold the valvesleeve and staple it in a mannersimilar to that illustrated in Figs. 9 to 11, inclusive, the closingmachine shown in Fig. 'l' is a diagrammatic view of a sewing head havinga needle 36 adapted to sew a seam 37 across the end 24 of the valvesleeve, as shown in Figs. 12 and 13. lit the valve sleeve is closed bysewing, it is preferable to provide reinforcing strips 38 in order toprevent tearing the paper.

While I have shown the valve sleeve as being placed in position in theform of a sheet and having the edges of the sheet united by the sameseam that closes the end of the bag. it will be readily recognized thatthe sleeve may be formed into a tube before being placed in position inthe bag, and sometimes this meth- 0d of operation is preferable. inFigs. 14: and 15 there is shown a valve sleeve 39 closed by a seam 40before it is placed in position in the bag. While it is desirable tohave this sleeve large enough to be sewed into the bagclosing seam at27, the same as in the form of sleeve shown in Figs. 1 to 13. inclusive,it is sometimes desirable to have the outer end of the sleeve ofsomewhat smaller diameter, the closing seam of the sleeve dippingdownward as at 41 until it is beneath the bag-closing 1,837,0dtll seam26. This leaves the end of the valvesleeve free to be collapsed in everydirection by a tie, such as the wire tie 42 illustrated in Fig. 15.

The form of sleeve shown in Figs. 14 and 15 is found quite effectivewhen made of cloth. When the sleeve is made of paper, even if the sleeveis closed by a wire or other tie, it is preferred to extend thebag-closing seam to the end of the sleeve as shown in Figs. 5 to 13, sothat the end of the sleeve is strengthened by the reinforced seam.

What I claim is:

1. A paper ba having one corner tucked in, a sleeve in t e tucked-incorner, and a seam closing the end of the bag, except for said tucked-incorner, and holding the sleeve in position in the valve, the sleeveextending into the seam between the walls of the bag.

2. A paper bag having one corner tucked in, a sheet of flexible materialfolded into said tucked-in corner and having its edges substantiallyeven with the end of the bag, and a seam closing the end of the bag,except for said tucked-in corner, and uniting the sides of said sheet toform a sleeve.

3. A bag having one corner tucked in, a sleeve in the tucked-in corner,and a seam closing the end of the bag, except for said tucked-in corner,and holding the sleeve in position in the valve, the sleeve extendingbeyond the side of the bag.

4.. A bag having one corner tucked in, a sheet of flexible materialfolded into said tucked-in corner and having its edges substantiallyparallel with the end of the bag, and a seam closing the end of the bag,except for said tucked-in corner, and uniting the sides of said sheet toform a sleeve, the sleeve extending beyond the side of the bag.

5. The method which consists in folding in one corner of a tube, placinga sleeve-forming member within the tucked-in corner, and sewing a seamacross the end of the bag and through a portion of the sleeve member,and thereby closing the end of the tube, except for the tucked-incorner, and holding the sleeve-member within said corner.

6. The method which consists in folding in one corner of a tube, placinga sheet of flexible material within the folded-in corner and with itsedges substantially parallel with the end of the tube, and sewing a seamacross the end of the tube and through the edges of the sheet, therebyclosing the end of the tube, except for the tucked-in corner, formingthe sheet into a sleeve, and holding the sleeve in place within thecorner.

7. The methodwhich consists in folding in one corner of an open-mouthedbag, placing a sleeve-forming member within the tuckedin corner and withits end projecting beyond the side of the bag, sewing a seam across themouth of the bag and along the side of the sleeve-forming member,filling the bag one corner of an open-mouthed bag, placing asleeve-forming member within the tuckedin corner and with its endprojecting beyond the edge of the bag, sewing a seam across the end ofthe bag and through a portion of said member, placing the sleeve over asubstantially horizontal filling tube, filling the bag through the tube,giving the filled bag a quarter turn away from the tube and therebyplacing the bag on its side with the sleeve extending upward andthereafter closing the the end of the sleeve.

10. The method which consists in folding in one corner of anopen-mouthed bag, plac- 14. A. package comprising a filled bag having afillmg sleeve at one corner, a closure extending across the end of thebag and along one side of the sleeve, and a sleeve-closure crossing thefirst said closure.

15. A package comprising a filled bag having a filling sleeve at onecorner, a sewed seam extending across the end of the bag and along oneside of the sleeve, and a row of staples across the end of the sleeve.

In testimony whereof I have hereunto signed my name to thisspecification.

JOHN G. REDINGTON.

ing a sleeve-forming member within the tucked-in corner and with its endprojecting beyond the edge of the bag, sewing a seam across the end ofthe bag and through a portion of said member, placing the sleeve over asubstantially horizontal filling tube, filling the bag through the tube,giving the filled bag a quarter turn away from the tube and therebyplacing the bag on its side with the sleeve extending upward, andpassing the bag sideways beneath a closing device and closing the end ofthe sleeve.

11. The method which consists in forming a valve with a filling openingin one side adj acent one end and with a sleeve pro'ecting from saidopening beyond the side of t e bag, placing the sleeve around asubstantially horizontal filling tube, filling the bag through the tube,giving the bag a quarter turn away from the tube and thereby placing theba with said sleeve extending upward, an thereafter closing the end ofthe tube.

12. The method which consists in forming a bag having a filling openingand a sleeve projecting from said opening, filling the bag through said0 ening, and thereafter folding and stapling t e outer end of thesleeve.

. 13. The method which consists in forming a valve with a fillingopening in one side adjacent one end and with a sleeve projecting fromsaid opening beyond the side of the bag, placing the sleeve around asubstantially horizontal filling tube, filling the bag through the tube,giving the bag a quarter turn away from the tube and thereby placing thebag with said v sleeve extending upward, and thereafter folding andstapling the end of the tube.

